re PR libstdc++/52839 (double free or corruption running tr1/.../default_weaktoshared.exe)

	PR libstdc++/52839
	* acinclude.m4 (_GLIBCXX_ATOMIC_BUILTINS): Do not depend on
	glibcxx_cv_atomic_long_long.
	* configure: Regenerate.

From-SVN: r186453

libstdc++-v3/ChangeLog

+2012-04-14  Alan Modra  <amodra@gmail.com>
+
+	PR libstdc++/52839
+	* acinclude.m4 (_GLIBCXX_ATOMIC_BUILTINS): Do not depend on
+	glibcxx_cv_atomic_long_long.
+	* configure: Regenerate.
+
 2012-04-13  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* testsuite/26_numerics/cmath/51083.cc: Move...

libstdc++-v3/acinclude.m4

@@ -2861,11 +2861,10 @@ EOF
   CXXFLAGS="$old_CXXFLAGS"
   AC_LANG_RESTORE
 
-  # Set atomicity_dir to builtins if all of above tests pass.
+  # Set atomicity_dir to builtins if all but the long long test above passes.
   if test $glibcxx_cv_atomic_bool = yes \
      && test $glibcxx_cv_atomic_short = yes \
-     && test $glibcxx_cv_atomic_int = yes \
-     && test $glibcxx_cv_atomic_long_long = yes ; then
+     && test $glibcxx_cv_atomic_int = yes; then
     AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
     [Define if the compiler supports C++11 atomics.])
     atomicity_dir=cpu/generic/atomicity_builtins

libstdc++-v3/configure

@@ -15446,11 +15446,10 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-  # Set atomicity_dir to builtins if all of above tests pass.
+  # Set atomicity_dir to builtins if all but the long long test above passes.
   if test $glibcxx_cv_atomic_bool = yes \
      && test $glibcxx_cv_atomic_short = yes \
-     && test $glibcxx_cv_atomic_int = yes \
-     && test $glibcxx_cv_atomic_long_long = yes ; then
+     && test $glibcxx_cv_atomic_int = yes; then
 
 $as_echo "#define _GLIBCXX_ATOMIC_BUILTINS 1" >>confdefs.h
 
@@ -15482,7 +15481,7 @@ $as_echo "$as_me: WARNING: Performance of certain classes will degrade as a resu
   # unnecessary for this test.
 
     cat > conftest.$ac_ext << EOF
-#line 15485 "configure"
+#line 15484 "configure"
 int main()
 {
   _Decimal32 d1;
@@ -15524,7 +15523,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
   # unnecessary for this test.
 
     cat > conftest.$ac_ext << EOF
-#line 15527 "configure"
+#line 15526 "configure"
 template<typename T1, typename T2>
   struct same
   { typedef T2 type; };
@@ -15558,7 +15557,7 @@ $as_echo "$enable_int128" >&6; }
     rm -f conftest*
 
     cat > conftest.$ac_ext << EOF
-#line 15561 "configure"
+#line 15560 "configure"
 template<typename T1, typename T2>
   struct same
   { typedef T2 type; };